Blockchain Engineer Job GradientFI
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About the Role
We are looking for an experienced Blockchain Engineer to lead the architecture and development of secure, scalable decentralized applications. You will be responsible for end-to-end development, from writing gas-optimized smart contracts to building the backend infrastructure that interacts with the blockchain.
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Responsibilities
- Smart Contract Development: Design, develop, and deploy secure smart contracts on EVM-compatible chains (Ethereum, Polygon, etc.) using Solidity.
- Backend Integration: Build robust APIs and microservices to interact with blockchain nodes using Node.js (or Rust/Python) and libraries like Ethers.js, Viem, or Web3.js.
- Security & Optimization: Conduct internal audits, implement gas-optimization strategies, and ensure contract security against common vulnerabilities (re-entrancy, front-running).
- System Architecture: Design decentralized architectures involving IPFS, Oracles (Chainlink), and indexing solutions (The Graph).
- Collaboration: Work with frontend developers to integrate wallets and DApp logic, and collaborate with product managers to define technical feasibility.
- Documentation: Maintain comprehensive technical documentation for smart contracts and API endpoints.
Requirements
- Education: Bachelor’s degree in Computer Science or equivalent practical experience.
- Engineering Experience: 5+ years of total software engineering experience (Backend or Full Stack).
- Blockchain Experience: 4+ years of professional experience specifically in Web3/Blockchain development.
- Smart Contract Proficiency: Strong expertise in Solidity, including experience with development frameworks like Hardhat or Foundry.sof
- Backend Proficiency: Proficiency in Node.js/TypeScript (NestJS/Express).
- Database Skills: Experience with SQL (PostgreSQL).
- Cryptography: Solid understanding of elliptic curve cryptography, hashing algorithms (Keccak-256), and public-key infrastructure.
- Tooling: Familiarity with OpenZeppelin standards, wallet integrations (WalletConnect/RainbowKit), and subgraph development.
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